ugh, that is just so horrible! Those poor doggies.
I can't believe she even left the collar/id tags on the little boy if she was just planning to "let them run" anyways. I hope you can find a beagle rescue who can help. How do some people sleep at night?!?!
I wanted to add that I know there is an Atlanta Beagle Rescue, but I don't know how far that is from you. Hopefully, there is something closer. Here is the website, just in case they might be able to help:
http://www.atlantabeaglerescue.org/